Rakesh Patel: ES6

Thursday, November 30, 2023

ECMAScript 2023 Object.groupBy

ECMAScript 2023, the 14th edition of the language, has some great changes that will make your programming life easier.

const inventory = [
  { name: "asparagus", type: "vegetables", quantity: 5 },
  { name: "bananas", type: "fruit", quantity: 0 },
  { name: "goat", type: "meat", quantity: 23 },
  { name: "cherries", type: "fruit", quantity: 5 },
  { name: "fish", type: "meat", quantity: 22 },
];

function myCallback({ quantity }) {
  return quantity > 5 ? "ok" : "restock";
}

const result2 = Object.groupBy(inventory, myCallback);
console.log(result2)
  
//Result....
  
  {
    "restock": [
        {
            "name": "asparagus",
            "type": "vegetables",
            "quantity": 5
        },
        {
            "name": "bananas",
            "type": "fruit",
            "quantity": 0
        },
        {
            "name": "cherries",
            "type": "fruit",
            "quantity": 5
        }
    ],
    "ok": [
        {
            "name": "goat",
            "type": "meat",
            "quantity": 23
        },
        {
            "name": "fish",
            "type": "meat",
            "quantity": 22
        }
    ]
}

Reference